package com.suncaper.shop.component;


import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class SalerLoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object user = request.getSession().getAttribute("userInfo");//获取键是"userInfo的值"
        if (user == null) {
            //未登陆，就应该拦截，返回登陆页面
            request.setAttribute("msg", "没有权限请先登陆");
            //转发到index.html  由于配置了视图解析器，则跳转到login.html
            request.getRequestDispatcher("/saler_login").forward(request, response);
            // 等同于 response.sendRedirect
            return false;
        } else {
            //已登陆，放行请求
            return true;
        }
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}
